Horn-operating mechanism for use in slugging or nailing machines.



M. T. DENNE. HORN OPERATING MECHANISM FOR USE IN SLUGGING 0R NAILING MACHINES.

APPLICATION FILED OCT. 23. I915- Patented Dec. 25, 1917.

2 SHEETS SHEET I.

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Invenrof. Mark TQDenne Y AT Tys;

M.T.D ENNE. HORN OPERATING MECHANISM FOR USE IN SLUGGING 0R NMLING MACHINES.

APPLICATION FILED OCR 23. 1915- .S. n m H e A v n %m .n aH m M e Mm 1m. Tlk T m G M B m f MARK THOMAS DENNE, OF RUSHDEN, ENGLAND.

HORN-OPERATING MECHANISM FOR USE IN SLUGGING- 0R NAILIN'G MACHINES.

Specification of Letters Patent.

Patented Dec. 25; 1917.

Original application filed September 22, 1914, Serial No. 863,024. Divided and this application filed October To all whom it may concern:

Be it known that 1, MARK THOMAS DENNE, a subject of the King of Great Britain and Ireland, residing at Rushden, Northamptonshire, England, have invented new and useful Improvements in and Relating to Horn- Operating Mechanism for Use in Slugging or Nailing Machines, of which the following is a specification.

This invention has reference to improvements in and relating to horn operating mechanism for use in slugging or nailing machines and its object is to provide simple means whereby the horn or work support shall normally have but a small amount of vertical movement sufficient to enable the work feeding to be eifected but when the machine is stopped will insure the horn dropping farther down to enable the work to be easily removed and other work inserted.

My invention is illustrated in the accompany drawings wherein Figure 1 shows in side elevation the head of a slugging machine having my invention applied thereto and Fig. 2 shows an end or face View on a larger scale of only the invention forming the subject of this application, which is a division of my application Serial No. 863024, filed September 22, 1914. 7

Referring to the drawings the numeral 1 indicates the head or frame of the machine which is provided with bearings 2 in which a cam shaft 3 is journaled.

Mounted on the cam shaft 3 is a cam 4; which operates a driver and a wire feed, cam 5 to operate wire cutting means and to also operate means whereby when the machine is brought to rest a horn will be lowered a fairly considerable distance to enable work to be removed or inserted without trouble, and a cam 6 whereby a horn is lowered at each revolution of the cam shaft only sufficiently to enable the work to be fed forward and to operate a brake when the machine is being stopped.

The numeral 72 indicates the usual treadle rod by the operation of which the machine is started and stopped in the well known manner.

The rod 42 and the pawl carrier 51 are also the usual known means whereby the constantly reciprocating pawl carried by the latter is made, through the usual levers,

Serial No. 57,583.

whereby the pawl carrier 51 will be made to have a considerable movement imparted to it when the machine is stopped.

The pawl carrier is suspended on a rod 51 the upper end of which is linked to the short arm 50 of a bell crank lever the other arm 50 of which derives movement from a cam race 46 in the cam disk 6 so that at every revolution of the cam shaft 3 the part 51 will be lifted a short distance and then by the action of gravity assisted by a spring (not shown) made to move down again.

The bell crank lever 50, 50 is carried pivotally on a spindle 71 on which an arm or lever 47 that derives movement from a cam race 45 in the cam 5 is rigidly mounted. The said spindle also has rigidly mounted on it an arm 47 from the end of which a rod 48 formed with a hook 48 depends, the said hook being adapted to engage under an abutment 19 on the pawl carrier 51 when the machine is stopped and thus to couple the arm 47 to the pawl carrier.

This coupling up is effected at the moment when the machine is stopped by the following means.

The numeral 70 indicates the usual band brake around the cam disk 6. One end of said band brake is connected to the spindle 71 and the other end is engaged by the quasi cylindrical head 58 of a lever mounted on a pin 53-. Said pin also carries a tumbler 53 whose opposite end 56 enters a slot 55 in a block carried on a treadle rod 52.

The tumbler 53 has an arm or block 57 which when the rod 52 is raised is caused to push the hooked rod 48 so that its hook is clear of the abutment 49 on the pawl carrier 51 This is the relative position of the parts when the machine is running but when the machine is stopped the rod 52 by its downward movement swings the block 57 out of the way allowing the hook 48 to engage under the abutment 49. The arm M then lifts the pawl high upthereby causing the horn to drop a considerable distanceand immediately thereafter the arm 58 applies the brake.

WVhat I claim as my invention and desire to secure by Letters Patent, is

In a slugging or nailing machine, the combination with a horn or work support,a pawl:

carrier slidably mounted on an axially-movable rod, and a cam-operated lever connected to the said rod and adapted to reciprocate same to actuate the said pawl carrier and thereby depress the said horn intermittently to permit the work to be fed, of an abutment on the said" pawl carrier, a second cam-operated l8"61;,,& hooked link pivotal'ly suspended from the free end of the said lever and adapted to engage the said abutment, a tumbler for holding the-said linkout of engagement with the said abutment when the machine isrunning, and means for operating the said tumbler to permit such 15 engagement when the machine is about to be stopped so that the second cam-operated lever will actuate the pawlcarrier and thereby depress thehorn to a greater extent than the lever first referred to for the purpose of 20 MAR-K THOMAS DENNE.

Copies this-patent maybe obtainedltorfivei cents each, by-addressingthe "Commissioner 01 Iatents. Washington, D. C. 

